Nanometer auxiliary biological hydrogenation thickened oil yield increasing method

A heavy oil and biological technology, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of narrowing of heavy oil circulation channels, reduction of effective permeability, and impact on oil production, etc., to improve heavy oil production. quality, increase the seepage capacity of the oil phase, and promote the effect of reducing the viscosity of heavy oil

Pending Publication Date: 2022-05-27
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can effectively solve the problems in the heavy oil development process: such as heavy oil with high viscosity and large seepage resistance; the heavy components of heavy oil (waxy, colloidal asphaltenes) cause adsorption and accumulation in formations, near-well zones or pipeline surfaces, etc., thereby It narrows the circulation channels of water or heavy oil, reduces the effective permeability, and seriously affects oil extraction and other issues.

Method used

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  • Nanometer auxiliary biological hydrogenation thickened oil yield increasing method
  • Nanometer auxiliary biological hydrogenation thickened oil yield increasing method
  • Nanometer auxiliary biological hydrogenation thickened oil yield increasing method

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Experimental program
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Effect test

Embodiment 1

[0055] The nano-assisted biological hydrogenation heavy oil production increasing method of the present embodiment comprises the following steps:

[0056] (1) Analysis of reservoir geological characteristics, oil well production, reservoir minerals, formation water and heavy oil components, and heavy oil viscosity-temperature curve in a heavy oil block in Jilin Oilfield;

[0057] (2) According to the information in (1), according to the method of the present invention, the following combination is obtained by optimization: by mass percentage, microbial inoculum is 6%, hydrogen-producing nutrient solution is 10%, iron oxide is 0.05%, and the balance is water. Wherein the microbial inoculum is prepared by fermentation of Clostridium bacteria, and is mixed uniformly according to the above-mentioned preparation method to obtain the combined hydrogen-producing preparation A.

[0058] Wherein the microbial inoculum is prepared by fermentation of Clostridium inoculum, and the medium ...

Embodiment 2

[0068] The nano-assisted biological hydrogenation heavy oil production increasing method of the present embodiment comprises the following steps:

[0069] (1) Analysis of reservoir geological characteristics, oil well production, reservoir minerals, formation water and heavy oil components, and heavy oil viscosity-temperature curve in a heavy oil block in Liaohe Oilfield.

[0070] (2) According to the information in (1), according to the method of the present invention, the following combination is obtained by optimization: in terms of mass percentage, 10% of special microbial inoculants, 20% of hydrogen-producing nutrient solution, 0.03% of titanium dioxide, 0.001% of graphene, and the remainder The amount is water. Among them, the special microbial inoculum is prepared by fermentation of Citrobacter bacteria. According to the above-mentioned preparation method, the mixture is evenly mixed to obtain the combined hydrogen-producing preparation B.

[0071] The special microbia...

Embodiment 3

[0080] The nano-assisted biological hydrogenation heavy oil production increasing method of the present embodiment comprises the following steps:

[0081] (1) Analysis of reservoir geological characteristics, oil well production, reservoir minerals, formation water and heavy oil components, and heavy oil viscosity-temperature curve in a heavy oil block in Nanyang Oilfield.

[0082] (2) According to the information in (1), according to the method of the present invention, the following combinations are obtained by optimization: by mass percentage, 12% of special microbial inoculants, 15% of hydrogen-producing nutrient solution, 0.1% of zinc oxide, 0.02% of copper oxide, Manganese oxide 0.02%, the balance is water. The special microbial inoculant is prepared by fermentation of Thermoanaerobacterium bacteria and Bacillus bacteria (mass ratio is 1:1) respectively. According to the above preparation method, the mixture is uniformly mixed to obtain a combined hydrogen-producing prep...

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Abstract

The invention discloses a nanometer auxiliary biological hydrogenation thickened oil yield increasing method, and relates to the technical field of oil exploitation. The method comprises the following steps: analyzing oil reservoir condition information of a heavy oil block; preparing a combined hydrogen production preparation and a nano material; and injecting the combined hydrogen production preparation and the nano material into an oil reservoir of a heavy oil block. According to the heavy oil recovery method, hydrogen is synthesized in situ by microorganisms under the assistance of a nano material, heavy oil is modified by using the hydrogen, and the microorganisms for synthesizing the hydrogen grow under anaerobic or facultative anaerobic conditions according to different viscosities and different oil reservoir conditions, so that the heavy oil is recovered. The generated hydrogen is used for carrying out hydro-upgrading on the heavy oil in the oil reservoir under the assistance of the nano material, so that a series of physical and chemical properties of the heavy oil are changed, such as the acid value, the heavy metal content, the sulfur content and the carbon-hydrogen ratio are reduced, and the method has the functions of reducing resistance, reducing viscosity, reducing pour point, improving the seepage capacity and quality of the heavy oil and the like, so that the recovery rate of the heavy oil is greatly improved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a biological exploitation method applied to exploitation or recovery of heavy oil resources. Background technique [0002] "Exploration, development and utilization of heavy oil reservoir resources" is included in the key areas and priority topics of future research and development; exploring and researching sustainable, cost-effective heavy oil enhanced oil recovery technologies is critical to maintaining my country's petroleum industry and national economy. Sustained development is significant. my country is the second largest oil consumer in the world and the fourth largest oil producer in the world. At the same time, my country's dependence on foreign oil (heavy oil and oil products) has exceeded 70%. Therefore, the study of heavy oil development technology and the shift of emphasis on heavy oil production have important strategic significance to meet the growi...

Claims

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Application Information

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IPC IPC(8): E21B43/16E21B43/22E21B41/00
CPCE21B43/16E21B43/168E21B41/00
Inventor 夏文杰马挺郑雄杰靳天志张璐姚舜徐航
Owner NANKAI UNIV
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